CN216304430U

CN216304430U - Lifting device for bridge construction

Info

Publication number: CN216304430U
Application number: CN202120536618.5U
Authority: CN
Inventors: 霍军会
Original assignee: Shaanxi Provincial Transport Planning Design and Research Institute Co Ltd
Current assignee: Shaanxi Provincial Transport Planning Design and Research Institute Co Ltd
Priority date: 2021-03-15
Filing date: 2021-03-15
Publication date: 2022-04-15
Anticipated expiration: 2031-03-15

Abstract

The utility model provides a lifting device for bridge construction, which belongs to the technical field of bridge construction equipment and comprises a supporting mechanism, a lifting mechanism, a jaw mechanism, a driving piece and a driving piece, wherein the power output end of the driving piece is connected with the driving piece through the supporting mechanism, a sliding through groove is formed in the supporting mechanism, the lifting mechanism penetrates through the sliding through groove and is connected with the supporting mechanism, the lifting mechanism slides along the axial direction of the sliding through groove, the jaw mechanism is connected with the lifting mechanism, and the driving piece is connected with the lifting mechanism. The whole operation process of the lifting device is near a steel reinforcement cage for pouring the pier stud, the required construction space is greatly reduced compared with that of a crane, and the construction is convenient.

Description

Lifting device for bridge construction

Technical Field

The utility model belongs to the technical field of bridge construction equipment, relates to a bridge template erection technology in bridge construction, and particularly relates to a lifting device used in bridge construction.

Background

In the construction process of a bridge, particularly a road bridge, a pier stud is a substructure which is an important part in the construction process, and a plurality of schemes are provided for the construction of the pier stud. The steel form is at the process of setting up, adopts multistage steel form segmentation to fold in order to reach the purpose that increases pier stud height requirement, and among the prior art, the steel form lifts by crane through the crane when raising, and it has following technical problem:

1. the operation space required by the crane in the lifting process is relatively large, and in the road repairing process, especially when the road is repaired beside an urban road, the space size of the construction enclosure is limited so as not to influence the traffic operation of the surrounding road, so that the operation space of the crane is limited, and the construction is inconvenient.

2. The steel form that the lifting machine hoisted up hangs in the air, and it has the steel form not to hang the risk that drops well, causes the hidden danger for site operation personnel's personal safety.

SUMMERY OF THE UTILITY MODEL

Aiming at the problem that the existing steel formwork occupies a large operation space during hoisting in bridge construction, the utility model provides a lifting device for bridge construction, which is specially used for lifting the steel formwork in bridge construction, has a moving range near a pier stud, and occupies a small operation space. The specific technical scheme is as follows:

a lifting device for in bridge construction, including supporting mechanism, lifting mechanism, jack catch mechanism, driving piece and driving medium, the power take off end of driving piece passes through supporting mechanism and is connected with the driving medium, the last slip that is provided with of supporting mechanism leads to the groove, lifting mechanism passes the slip and leads to the groove and is connected with supporting mechanism, lifting mechanism leads to the endwise slip of groove along sliding, jack catch mechanism is connected with lifting mechanism, the driving medium is connected with lifting mechanism.

Further inject, lifting mechanism includes bent shape connecting rod, nut seat and lead screw, the lead screw sets up at the logical inslot that slides along the axial that the groove is led to in the slip, nut seat and lead screw threaded connection, the relative both sides portion of nut seat all is provided with bent shape connecting rod, bent shape connecting rod extends to and slides and lead to the groove outside and be connected with jack catch mechanism, nut seat drives bent shape connecting rod and jack catch mechanism along the axial slip that the groove is led to in the slip, nut seat is connected with the driving medium.

Further inject, the both sides portion that the nut seat is relative is provided with the stopper, the stopper extends to outside the groove that passes through that slides, the nut seat is connected with bent shape connecting rod through the stopper.

Further inject, jack catch mechanism includes jack catch and locking screw, the cross section of jack catch is crescent, be provided with the connecting block on the outside cambered surface of jack catch, be provided with the connecting hole on the bent shape connecting rod, the connecting block is pegged graft and is connected jack catch and bent shape connecting rod in the connecting hole, one side adjacent with the connecting hole on the bent shape connecting rod is provided with the locking hole, locking screw passes the locking hole and pushes up on the connecting block.

Further limit, be provided with the flexible bed course on the inboard cambered surface of jack catch.

Further, the connecting block is in a prism shape, and the connecting hole is a prism-shaped hole matched with the connecting block.

Further inject, the supporting mechanism includes guide arm and base, the guide arm is connected in the base top, the guide arm is provided with the slip logical groove along its axial, the upper end of guide arm is connected with the upper end of lead screw through the locating piece.

Further inject, supporting mechanism still includes first landing leg, second landing leg, third landing leg and fourth landing leg, first landing leg, second landing leg, third landing leg and fourth landing leg all set up in the base below, just first landing leg and second landing leg all correspond the setting with the guide arm, third landing leg and fourth landing leg all correspond the setting with curved shape connecting rod.

Further inject, the driving medium includes worm wheel and worm, be provided with the transmission hole on the base, the power take off end of driving piece passes the transmission hole and is connected with the worm wheel, the worm wheel meshes with the worm, the lower extreme fixed connection of worm and lead screw.

Further defined, the drive member is a rotating hand wheel.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model relates to a lifting device for bridge construction, which comprises a supporting mechanism, a lifting mechanism, a jaw mechanism, a driving piece and a transmission piece, wherein when the lifting device is used, a cylindrical steel template for a pier stud is clamped by the jaw mechanism, the transmission piece is driven to operate by the driving piece, the driving piece can drive the lifting mechanism to move up and down along the axial direction of a sliding through groove on the supporting mechanism, and the jaw mechanism can be driven to move up and down along the axial direction of the sliding through groove by the up-and-down movement of the lifting mechanism, so that the lifting of the cylindrical steel template is realized. The whole operation process is performed near a steel reinforcement cage for pouring the pier stud, the required construction space is greatly reduced compared with that of a crane, and the construction is convenient; and only need with the steel form lift to the position that needs the installation can, do not need the too high of lifting, the safe risk that exists also reduces greatly with the lifting machine comparison.

2. The two opposite end parts of the nut seat are provided with limiting blocks, the limiting blocks extend out of the sliding through grooves, the positions of the nut seat in the sliding through grooves can be limited through the limiting blocks, and the nut seat is prevented from rotating in the sliding through grooves.

3. The cross section of jack catch is crescent, and crescent can conveniently snatch the steel form chucking.

4. The flexible cushion layer is arranged on the inner side cambered surface of the clamping jaw, so that the clamping jaw is prevented from being in direct rigid contact with the steel formwork, and the clamping jaw is prevented from being abraded by the steel formwork.

5. The connecting block is prism-shaped, and the connecting hole is a prism-shaped hole matched with the connecting block. The prism-shaped structure can prevent the connecting block from rotating in the connecting hole and can clamp the connecting block in the connecting hole.

6. And a locking hole is formed in one side of the curved connecting rod adjacent to the connecting hole, and a locking screw penetrates through the locking hole and abuts against the connecting block. Can lock, the position of fixed connection piece in the connecting hole through locking screw, can adjust the connecting block after not hard up locking screw and stretch into the degree of depth of connecting hole, adjust the interval between two jack catchs then, make two jack catchs can be suitable for the cylindrical steel form of different diameters.

7. First landing leg and second landing leg all correspond the setting with the guide arm, and third landing leg and fourth landing leg all correspond the setting with bent shape connecting rod, support the guide arm through first landing leg and second landing leg, support two bent shape connecting rods through third landing leg and fourth landing leg, and multiplicable steel form is being lifted in-process stability.

Drawings

FIG. 1 is a first schematic structural diagram of a lifting device for bridge construction according to the present invention;

FIG. 2 is a partial enlarged view of portion A of FIG. 1;

FIG. 3 is a schematic structural diagram of a second lifting device for bridge construction according to the present invention;

FIG. 4 is a side view of a lifting apparatus for use in bridge construction according to the present invention;

FIG. 5 is a cross-sectional view taken along plane D-D of FIG. 4;

FIG. 6 is a first schematic view of a lifting device for bridge construction according to the present invention;

FIG. 7 is a second schematic view of the lifting device for bridge construction according to the present invention;

the steel bar cage comprises a first supporting leg 1, a curved connecting rod 2, a nut seat 3, a sliding through groove 4, a positioning block 5, a guide rod 6, a second supporting leg 7, a third supporting leg 8, a fourth supporting leg 9, a locking screw 10, a flexible cushion layer 11, a clamping jaw 12, a connecting plug 13, a rotating hand wheel 14, a screw rod 15, a base 16, a turbine 17, a worm 18, a steel template 19 and a steel bar cage 20.

Detailed Description

The technical solutions of the present invention will be further explained below with reference to the drawings and examples, but the present invention is not limited to the embodiments explained below.

The utility model relates to a lifting device for bridge construction, which comprises a supporting mechanism, a lifting mechanism, a jaw mechanism, a driving piece and a driving piece, wherein the power output end of the driving piece is connected with the driving piece through the supporting mechanism, a sliding through groove is formed in the supporting mechanism, the lifting mechanism penetrates through the sliding through groove to be connected with the supporting mechanism, the lifting mechanism slides along the axial direction of the sliding through groove, the jaw mechanism is connected with the lifting mechanism, and the driving piece is connected with the lifting mechanism. Lifting mechanism includes bent shape connecting rod 2, nut seat 3 and lead screw 15, lead screw 15 is leading to the inslot at the slip along the axial setting that the groove is led to in the slip, nut seat 3 and lead screw 15 threaded connection, 3 relative both sides portions of nut seat all are provided with bent shape connecting rod 2, bent shape connecting rod 2 extends to and slides to lead to the groove outside to be connected with jack catch mechanism, nut seat 3 drives bent shape connecting rod 2 and jack catch mechanism along the axial slip that the groove is led to in the slip, nut seat 3 is connected with the driving medium. The two opposite sides of the nut seat 3 are provided with limiting blocks, and the nut seat 3 is connected with the curved connecting rod 2 through the limiting blocks. Jack catch mechanism includes jack catch 12 and locking screw 10, and the cross section of jack catch 12 is crescent, is provided with the connecting block on the outside cambered surface of jack catch 12, is provided with the connecting hole on the bent shape connecting rod 2, and the connecting block is pegged graft and is connected jack catch 12 and bent shape connecting rod 2 in the connecting hole, and one side adjacent with the connecting hole on the bent shape connecting rod 2 is provided with the locking hole, and locking screw 10 passes the locking hole and pushes up on the connecting block. The inner cambered surface of the clamping jaw 12 is provided with a flexible cushion layer 11. The connecting block is prism-shaped, and the connecting hole is a prism-shaped hole matched with the connecting block. The supporting mechanism comprises a guide rod 6 and a base 16, the guide rod 6 is connected above the base 16, a sliding through groove is formed in the guide rod 6 along the axial direction of the guide rod, and the upper end of the guide rod 6 is connected with the upper end of a lead screw 15 through a positioning block 5. The supporting mechanism further comprises a first supporting leg 1, a second supporting leg 7, a third supporting leg 8 and a fourth supporting leg 9, the first supporting leg 1, the second supporting leg 7, the third supporting leg 8 and the fourth supporting leg 9 are all arranged below the base 16, the first supporting leg 1 and the second supporting leg 7 are all arranged in a corresponding mode with the guide rod 6, and the third supporting leg 8 and the fourth supporting leg 9 are all arranged in a corresponding mode with the curved connecting rod 2. The transmission part comprises a worm wheel 17 and a worm 18, a transmission hole is formed in the base 16, the power output end of the driving part penetrates through the transmission hole to be connected with the worm wheel 17, the worm wheel 17 is meshed with the worm 18, and the worm 18 is fixedly connected with the lower end of the lead screw 15. The drive member is a rotating hand wheel 14.

Example 1

Referring to fig. 1 to 5, the lifting device for bridge construction in this embodiment includes a supporting mechanism, a lifting mechanism, a jaw mechanism, a driving element and a transmission element, the supporting mechanism includes a first leg 1, a guide rod 6, a second leg 7, a third leg 8, a fourth leg 9 and a base 16, the lifting mechanism includes a curved connecting rod 2, a nut seat 3 and a lead screw 15, the guide rod 6 is 13 meters in length, the lead screw 15 is 15 meters in length, the jaw mechanism includes a jaw 12 and a locking screw 10, the transmission element includes a turbine 17 and a worm 18, the driving element is a rotating hand wheel 14, a transmission hole is arranged on the base 16 along the width direction of the base 16, a transmission shaft is connected to a power output end of the rotating hand wheel 14, the transmission shaft passes through the transmission hole and is fixedly connected to the turbine 17, the turbine 17 is engaged with the lower end of the worm 18, the upper end of the worm 18 is fixedly connected to the lower end of the lead screw 15, a sliding through groove is formed in the guide rod 6 along the axial direction of the guide rod, the sliding through groove is communicated with the upper end face, the lower end face and two opposite side faces of the guide rod 6, the upper end of the lead screw 15 penetrates through the upper end of the guide rod 6 along the axial direction of the sliding through groove, a positioning block 5 is fixedly connected to the upper end of the lead screw 15, and the positioning block 5 is used for positioning the upper end of the lead screw 15 and preventing the lead screw 15 from moving up and down along the axial direction of the sliding through groove; the screw 15 is in threaded sleeve connection with the nut seat 3, two opposite side surfaces of the nut seat 3 are respectively connected with a limiting block, the limiting blocks extend out of the sliding through groove, and the nut seat 3 can be prevented from rotating along the sliding through groove through the limiting blocks; the two claws 12 and the two curved connecting rods 2 are respectively arranged, wherein one end part of one curved connecting rod 2 is connected with a limiting block at one side of the nut seat 3, one end part of the other curved connecting rod 2 is connected with a limiting block at the other side of the nut seat 3, and the two curved connecting rods 2 jointly form an inward surrounding structure; the other ends of the two curved connecting rods 2 are connected with clamping jaws 12, the cross sections of the clamping jaws 12 are of crescent structures, connecting blocks are fixedly connected to the outer arc surfaces of the clamping jaws 12, each connecting block is of a quadrangular structure, connecting holes are formed in the inner sides of the two curved connecting rods 2, the connecting holes are of quadrangular structures matched with the connecting blocks, the two clamping jaws 12 can be respectively connected with the two curved connecting rods 2 by inserting the connecting blocks into the connecting holes, the quadrangular structures can prevent the connecting blocks from rotating in the connecting holes, locking holes are formed in the side surfaces, adjacent to the connecting holes, of the two curved connecting rods 2, locking screws 10 penetrate through the locking holes and abut against the connecting blocks, when the locking screws 10 abut against the connecting blocks, the distance between the two clamping jaws 12 can be fixed, and when the locking screws 10 are loosened, the depth of the connecting blocks extending into the connecting holes can be adjusted, then, the distance between the two clamping jaws 12 is adjusted, the inner side cambered surfaces of the two clamping jaws 12 are arranged oppositely, the steel template 19 is conveniently clamped, the flexible cushion layers 11 are arranged on the inner side cambered surfaces of the two clamping jaws 12, the flexible cushion layers 11 are made of rubber, the clamping jaws 12 and the steel template 19 can be prevented from being in direct rigid contact through the flexible cushion layers 11, abrasion to the clamping jaws 12 is reduced, inserting holes are formed in the end portions of the two clamping jaws 12, connecting plug-in units 13 are inserted in the inserting holes, the flexible cushion layers 11 are connected with the clamping jaws 12 through the connecting plug-in units 13, and the connecting plug-in units 13 are inserted pins; guide arm 6 fixed connection is in the base 16 top, at base 16 below first landing leg 1 of fixedly connected with, second landing leg 7, third landing leg 8 and fourth landing leg 9, the hookup location of first landing leg 1 and second landing leg 7 corresponds with the hookup location of guide arm 6, the hookup location of third landing leg 8 and fourth landing leg 9 corresponds with the hookup location of two bent shape connecting rods 2 respectively, can guarantee the stability of steel form 19 when lifting through first landing leg 1, second landing leg 7, third landing leg 8 and fourth landing leg 9.

Referring to fig. 6 to 7, the lifting device for bridge construction of the present embodiment has the following working processes: block steel form 19 through two jack catchs 12, it is rotatory to rotate the hand wheel 14 and can drive the transmission shaft through rotating, the rotation of transmission shaft can drive turbine 17 rotatory, turbine 17's rotation can drive rather than the worm 18 rotation of meshing, worm 18 can drive rather than fixed connection's lead screw 15 rotatory, because the position of lead screw 15 and nut seat 3 all is limited, lead screw 15's rotation can drive nut seat 3 and reciprocate along the axial of sliding through groove, then drive curved connecting rod 2 and jack catch 12 and reciprocate along the axial of sliding through groove, the realization is to the lifting of steel form 19 of setting up in the steel reinforcement cage 20 outside.

Example 2

The embodiment is a lifting device used in bridge construction, and comprises a supporting mechanism, a lifting mechanism, a jaw mechanism, a driving part and a transmission part, wherein the supporting mechanism comprises a first supporting leg 1, a guide rod 6, a second supporting leg 7, a third supporting leg 8, a fourth supporting leg 9 and a base 16, the lifting mechanism comprises a curved connecting rod 2, a nut seat 3 and a lead screw 15, the length of the guide rod 6 is 10 meters, the length of the lead screw 15 is 11 meters, the jaw mechanism comprises a jaw 12 and a locking screw 10, the transmission part comprises a first bevel gear and a second bevel gear, the central line axis of the first bevel gear is perpendicular to the central line axis of the second bevel gear, the driving part is a motor, a transmission hole is arranged on the base 16 along the width direction of the base 16, a transmission shaft is connected to the power output end of the motor, the transmission shaft penetrates through the transmission hole to be fixedly connected with the first bevel gear, the first bevel gear is meshed with the second bevel gear, the second bevel gear is fixedly connected with the lower end of the lead screw 15, a sliding through groove is formed in the guide rod 6 along the axial direction of the guide rod, the sliding through groove is communicated with the upper end face, the lower end face and two opposite side faces of the guide rod 6, the upper end of the lead screw 15 penetrates through the upper end of the guide rod 6 along the axial direction of the sliding through groove, a positioning block 5 is fixedly connected to the upper end of the lead screw 15, and the positioning block 5 is used for positioning the upper end of the lead screw 15 and preventing the lead screw 15 from moving up and down along the axial direction of the sliding through groove; the screw 15 is in threaded sleeve connection with the nut seat 3, two opposite side surfaces of the nut seat 3 are respectively connected with a limiting block, the limiting blocks extend out of the sliding through groove, and the nut seat 3 can be prevented from rotating along the sliding through groove through the limiting blocks; the two claws 12 and the two curved connecting rods 2 are respectively arranged, wherein one end part of one curved connecting rod 2 is connected with a limiting block at one side of the nut seat 3, one end part of the other curved connecting rod 2 is connected with a limiting block at the other side of the nut seat 3, and the two curved connecting rods 2 jointly form an inward surrounding structure; the other ends of the two curved connecting rods 2 are connected with clamping jaws 12, the cross sections of the clamping jaws 12 are of crescent structures, connecting blocks are fixedly connected to the outer arc surfaces of the clamping jaws 12, each connecting block is of a hexagonal prism structure, connecting holes are formed in the inner sides of the two curved connecting rods 2, the connecting holes are of hexagonal prism structures matched with the connecting blocks, the two clamping jaws 12 can be respectively connected with the two curved connecting rods 2 by inserting the connecting blocks into the connecting holes, the hexagonal prism structures can prevent the connecting blocks from rotating in the connecting holes, locking holes are formed in the side surfaces, adjacent to the connecting holes, of the two curved connecting rods 2, locking screws 10 penetrate through the locking holes and abut against the connecting blocks, when the locking screws 10 abut against the connecting blocks, the distance between the two clamping jaws 12 can be fixed, and when the locking screws 10 are loosened, the depth of the connecting blocks extending into the connecting holes can be adjusted, then, the distance between the two clamping jaws 12 is adjusted, the inner side cambered surfaces of the two clamping jaws 12 are arranged oppositely, the steel template 19 is conveniently clamped, the flexible cushion layers 11 are arranged on the inner side cambered surfaces of the two clamping jaws 12, the flexible cushion layers 11 are made of plastics, the clamping jaws 12 and the steel template 19 can be prevented from being in direct rigid contact through the flexible cushion layers 11, abrasion to the clamping jaws 12 is reduced, inserting holes are formed in the end portions of the two clamping jaws 12, connecting plug-in units 13 are inserted in the inserting holes, the flexible cushion layers 11 are connected with the clamping jaws 12 through the connecting plug-in units 13, and the connecting plug-in units 13 are wedge-shaped inserting blocks; guide arm 6 fixed connection is in the base 16 top, at base 16 below first landing leg 1 of fixedly connected with, second landing leg 7, third landing leg 8 and fourth landing leg 9, the hookup location of first landing leg 1 and second landing leg 7 corresponds with the hookup location of guide arm 6, the hookup location of third landing leg 8 and fourth landing leg 9 corresponds with the hookup location of two bent shape connecting rods 2 respectively, can guarantee the stability of steel form 19 when lifting through first landing leg 1, second landing leg 7, third landing leg 8 and fourth landing leg 9.

This embodiment is used for lifting devices in bridge construction, and its working process is: block steel form 19 through two jack catchs 12, it is rotatory to drive the transmission shaft through the starter motor is rotatory, the rotation of transmission shaft can drive first bevel gear rotatory, first bevel gear's rotation can drive rotatory rather than the second bevel gear of meshing, second bevel gear's the lead screw 15 that can drive rather than fixed connection is rotatory, because the position of lead screw 15 and nut seat 3 all is limited, lead screw 15's rotation can drive nut seat 3 and reciprocate along the axial that slides logical groove, then drive curved connecting rod 2 and jack catch 12 and reciprocate along the axial that slides logical groove, the realization is to steel form 19's that the steel reinforcement cage 20 outside was set up lifting.

The driving part in the utility model can be an electric push rod, an air cylinder and other driving devices besides a rotating hand wheel 14 and a motor; the transmission member can be other transmission devices with powerful transmission functions besides the worm wheel 17 and the worm 18 or the first bevel gear and the second bevel gear; the lead screw 15 may also be replaced by a threaded rod or other threaded connection; the lengths of the guide rod 6 and the lead screw 15 can be selected according to the height of the pier stud on the construction site, and are not limited to the lengths given in the above embodiments; the material of the flexible cushion layer 11 is not limited to rubber and plastic, and any elastic and hard material can be used; the shapes of the connecting block and the connecting hole are not limited to a quadrangular prism structure and a hexagonal prism structure, and any prism structure capable of preventing the connecting block from rotating in the connecting hole can be used.

Claims

1. A lifting device for in bridge construction, its characterized in that, including supporting mechanism, lifting mechanism, jack catch mechanism, driving piece and driving medium, the power take off end of driving piece passes through supporting mechanism and is connected with the driving medium, the last slip that is provided with of supporting mechanism leads to the groove, lifting mechanism passes the slip and leads to the groove and be connected with supporting mechanism, lifting mechanism leads to the endwise slip of groove along sliding, jack catch mechanism is connected with lifting mechanism, the driving medium is connected with lifting mechanism.

2. The lifting device for bridge construction according to claim 1, wherein the lifting mechanism comprises a curved connecting rod (2), a nut seat (3) and a lead screw (15), the lead screw (15) is arranged in a sliding through groove along the axial direction of the sliding through groove, the nut seat (3) is in threaded connection with the lead screw (15), the curved connecting rod (2) is arranged on two opposite sides of the nut seat (3), the curved connecting rod (2) extends out of the sliding through groove to be connected with the jaw mechanism, the nut seat (3) drives the curved connecting rod (2) and the jaw mechanism to slide along the axial direction of the sliding through groove, and the nut seat (3) is connected with the transmission piece.

3. The lifting device for bridge construction according to claim 2, wherein the nut seat (3) is provided with limiting blocks at two opposite sides, the limiting blocks extend out of the sliding through groove, and the nut seat (3) is connected with the curved connecting rod (2) through the limiting blocks.

4. The lifting device for the bridge construction according to claim 3, wherein the jaw mechanism comprises a jaw (12) and a locking screw (10), the cross section of the jaw (12) is crescent-shaped, a connecting block is arranged on the outer arc surface of the jaw (12), a connecting hole is arranged on the curved connecting rod (2), the connecting block is inserted into the connecting hole to connect the jaw (12) and the curved connecting rod (2), a locking hole is arranged on one side of the curved connecting rod (2) adjacent to the connecting hole, and the locking screw (10) penetrates through the locking hole and abuts against the connecting block.

5. A lifting device for use in bridge construction according to claim 4, characterised in that the jaws (12) are provided with a flexible pad (11) on their inner arc.

6. The lifting device for bridge construction as claimed in claim 5, wherein the connecting block is prism-shaped, and the connecting hole is a prism-shaped hole matched with the connecting block.

7. The lifting device for bridge construction according to claim 6, wherein the supporting mechanism comprises a guide rod (6) and a base (16), the guide rod (6) is connected above the base (16), the guide rod (6) is provided with a sliding through groove along the axial direction of the guide rod, and the upper end of the guide rod (6) is connected with the upper end of the screw rod (15) through the positioning block (5).

8. The lifting device for use in bridge construction according to claim 7, wherein the support mechanism further comprises a first leg (1), a second leg (7), a third leg (8) and a fourth leg (9), wherein the first leg (1), the second leg (7), the third leg (8) and the fourth leg (9) are all disposed under the base (16), the first leg (1) and the second leg (7) are all disposed corresponding to the guide rod (6), and the third leg (8) and the fourth leg (9) are all disposed corresponding to the curved connecting rod (2).

9. The lifting device for bridge construction according to claim 7 or 8, wherein the transmission member comprises a worm wheel (17) and a worm screw (18), the base (16) is provided with a transmission hole, the power output end of the driving member passes through the transmission hole to be connected with the worm wheel (17), the worm wheel (17) is meshed with the worm screw (18), and the worm screw (18) is fixedly connected with the lower end of the lead screw (15).

10. Lifting device for use in bridge construction according to claim 9, characterised in that the driving element is a turning hand wheel (14).